AL3353S-13

AL3353 HIGH PERFORMANCE BOOST LED CONTROLLER Description Pin Assignments NEW PRODUCT The AL3353 is a highly-integrated and cost-effective Light Emitting Diode (LED) controller optimized for LCD monitor and LCD TV backlighting application. It provides a high-performance LED backlight solution with low-BOM cost. (Top View) The AL3353 contains a PWM boost driver, which uses current mode control and fixed frequency operation to regulate the LED current. The LED current is sensed through an external current sense resistor. The voltage across the sensing resistor is compared with reference level of 400mV; the error is amplified to control the pulse width of the power switch thus to regulate the current flowing the LED. VIN 1 8 PWM GATE 2 7 OVP GND 3 6 COMP CS 4 5 FB The AL3353 offers PWM-to-analog dimming mode for a wide range of dimming control. SO-8 (Type TH2) The AL3353 has comprehensive protection features such as power MOSFET overcurrent protection (OCP), output overvoltage protection (OVP), diode and inductor short protection, LED cathode short-toGND protection, IC power supply undervoltage lockout (UVLO), LED open protection, VOUT short protection, and overtemperature protection (OTP). The AL3353 is available in the SO-8 (Type TH2) package. Features • • • • • • • • Applications Wide Input Voltage Range: 9V to 40V High Precision Feedback Reference Voltage: 400mV/±1.5% Current Mode PWM Controller with Good Dynamic Response PWM to Analog Dimming Mode Built-In Comprehensive Protections  Undervoltage Lockout (UVLO)  Output Overvoltage Protection (OVP)  Power MOSFET Overcurrent Protection (OCP)  Diode and Inductor Short Protection  LED Cathode Short to GND Protection  LED Open Protection VOUT Short Protection  • • • LCD TV LCD Monitor Flat Panel Display  Overtemperature Protection (OTP) Available in Pb-Free SO-8 (Type TH2) Package Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: AL3353 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain